VDA-FS
VDA-FS is a CAD [data exchange] format for the transfer of freeform [surface modelling|surface models] from one CAD system to another.
Its name is an abbreviation of "Verband der Automobilindustrie - Flächenschnittstelle", which translates to the "automotive industry association - surface data interface".
Standard was specified by the German organization VDA
VDA-FS has been superseded by STEP, ISO 10303.